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Centrifugal compressor

a centrifugal compressor and centrifugal technology, applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of poor performance (or a reduced pressure ratio), or the increase of the power to drive the impeller, so as to suppress the reduction of the pressure ratio and the moment of inertia of the impeller. , the effect of reducing the moment of thrust load acting

Active Publication Date: 2022-08-16
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]An object of the present invention is to provide a centrifugal compressor capable of achieving both reduction in moment of inertia of an impeller and in thrust load acting on the impeller, and suppression of reduction in pressure ratio.

Problems solved by technology

This entails poor performance (or a reduced pressure ratio), or increased power to drive the impeller.

Method used

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  • Centrifugal compressor
  • Centrifugal compressor
  • Centrifugal compressor

Examples

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Embodiment Construction

[0013]An embodiment of the present invention will now be described with reference to the drawings. In the figures referred to below, any identical or equivalent member is identically denoted.

[0014]FIG. 1 is a diagram schematically showing a configuration of a centrifugal compressor according to an embodiment of the present invention. As shown in FIG. 1, the centrifugal compressor 1 includes an impeller 100, a turbine wheel 200, a rotation shaft 310, a motor 320, a bearing 330, and a casing 400.

[0015]The rotation shaft 310 interconnects the impeller 100 and the turbine wheel 200. The rotation shaft 310 is rotationally driven by the motor 320. The rotation shaft 310 is received by bearing 330. The motor 320 includes a rotor and a stator (not shown).

[0016]The casing 400 houses the impeller 100, the turbine wheel 200, the rotation shaft 310, the motor 320, and the bearing 330. The casing 400 has a compressor housing 410, a turbine housing 420, and a center housing 430.

[0017]The compress...

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Abstract

A centrifugal compressor comprises a rotation shaft, an impeller, and a casing. The impeller has a hub and a plurality of blades. The casing has an opposite surface facing a back surface of the hub, and a projection projecting from the opposite surface toward the impeller. The hub is provided with an accommodation space that accommodates the projection. The accommodation space includes a through hole penetrating the hub from the back surface toward an external radial surface. The through hole opens while avoiding the blades.

Description

[0001]This nonprovisional application is based on Japanese Patent Application No. 2020-123640 filed on Jul. 20, 2020 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a centrifugal compressor.Description of the Background Art[0003]For example, Japanese Patent Laid-Open No. 2018-168707 discloses a centrifugal compressor including an impeller. The impeller in the centrifugal compressor has a hub having an external radial surface and a back surface, and a plurality of blades. The hub is provided with a through hole formed therethrough between the external radial surface and the back surface. The through hole thus formed reduces a moment of inertia of the impeller and a thrust load acting on the impeller.SUMMARY OF THE INVENTION[0004]In the centrifugal compressor described in Japanese Patent Laid-Open No. 2018-168707, a portion of an air current flowing t...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F04D29/66F04D29/42F04D29/28F04D17/10
CPCF04D29/667F04D17/10F04D29/284F04D29/4206F04D29/083F04D29/681F04D29/0516F04D29/053F04D29/161F05D2240/20F05D2210/12
Inventor UMEYAMA, RYONAKANE, YOSHIYUKI
Owner TOYOTA IND CORP
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